CN115214435A - Locking device for vehicle tilting seat - Google Patents

Locking device for vehicle tilting seat Download PDF

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Publication number
CN115214435A
CN115214435A CN202210349840.3A CN202210349840A CN115214435A CN 115214435 A CN115214435 A CN 115214435A CN 202210349840 A CN202210349840 A CN 202210349840A CN 115214435 A CN115214435 A CN 115214435A
Authority
CN
China
Prior art keywords
seat
walk
pawl
connection frame
driving plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202210349840.3A
Other languages
Chinese (zh)
Inventor
李廷斌
郭海东
卜权和
尹喆焕
张宰瑢
黄俊植
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hyundai Transys Inc
Original Assignee
Hyundai Dymos Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hyundai Dymos Inc filed Critical Hyundai Dymos Inc
Publication of CN115214435A publication Critical patent/CN115214435A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/433—Safety locks for back-rests, e.g. with locking bars activated by inertia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/10—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable tiltable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/2358—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls and provided with memory locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/12—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable and tiltable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/2218—Transversally moving locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2352—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with external pawls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B60N2/919—Positioning and locking mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/20—Anchoring devices adjustable in position, e.g. in height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/26—Anchoring devices secured to the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B60N2/919—Positioning and locking mechanisms
    • B60N2002/952—Positioning and locking mechanisms characterised by details of the locking system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R2022/1806—Anchoring devices for buckles

Abstract

The present invention relates to a locking device of a roll-over seat for a vehicle, comprising: a driving plate coupled to a connecting frame connecting between a side frame supporting a cushion frame and a seat back frame, the connecting frame being moved to a tumbled position upon a tumbling operation of a seat; a pawl mounted on the connection frame and restraining the driving plate at a position before a walk-in operation of the seat or releasing the restraint of the driving plate at the walk-in operation; a locking lever installed on the connection frame and rotating the pawl in a direction of restraining the driving plate or in a direction of releasing the restraint of the driving plate; and a pressurizing shaft fixed to a lower end portion of the seat belt buckle and protrudingly coupled to the connection frame to laterally apply a load to the pawl in a direction in which the pawl is locked with the driving plate according to the load applied to the seat belt buckle, so that the locked state can be firmly maintained before the walk-in operation of the walk-in seat.

Description

Locking device for vehicle tilting seat
Technical Field
The present invention relates to a locking device of a walk-in seat for a vehicle, and more particularly, to a locking device of a walk-in seat for a vehicle, which can firmly maintain a locked state before a walk-in operation of the walk-in seat, using a structure in which the amount of tooth engagement between a driving plate and pawls can be increased by a load acting on a seat belt buckle.
Background
In general, seats installed in a passenger vehicle compartment are installed in one row and two rows, while in the case of a van vehicle, a sport utility vehicle, and the like, seats are installed in a seat arrangement of three or more rows, and the seats may also be installed in other various arrangements depending on the vehicle.
In order to provide a comfortable seating feeling to passengers or to take convenience into account for getting on and off the vehicle, various mechanisms are employed for the vehicle seat.
In particular, in a vehicle in which three or more rows of seats are installed, the first and second rows of seats can be immediately loaded by opening the front and rear doors, respectively, but in the case of the third row of seats, a mechanism that moves the second row of seats forward to secure an entry and exit passage for loading and unloading is mostly employed.
For example, as the second-row seat for securing the getting-on/off passage of the third-row seat, a double-folding seat in which the seat back and the seat cushion are folded forward in a state in which the seat back is folded to the seat cushion, a seat-cushion-tilt up-slide seat in which the seat back and the seat cushion are slid forward in a state in which the seat cushion front end portion is rotated to be tilted upward, a walk-in seat in which the seat back is rotated forward while the seat cushion is tilted downward and is erected, and the like are employed.
Fig. 1 is a side view showing a state in which a tilt-tumble second-row seat is operated.
As shown in fig. 1, the operation of Tilting down (Tilting) the seat cushion 10 of the tilt-flip type second row seat and the operation of rotating forward and standing up the seat back 20 arranged to be tilted backward are simultaneously performed, so that the getting-on and getting-off passage of the passenger of the third row seat can be easily secured.
More specifically, in a state where the seat cushion frame 120 is tiltably connected to the side frames 110 mounted on the seat rails 100 and the connecting frame 140 connecting between the seat cushion frame 120 and the seat back frame 130 is rotatably connected to the side frames 110, the getting-on and getting-off passage of the passenger in the third row of seats can be easily secured by the operation of tilting the seat cushion frame 120 downward and the operation of rotating the seat back frame 130 and the connecting frame 140 forward and upright.
Referring to fig. 1, the seat cushion frame 120 is hinge-coupled to and supported by the side frames 110, and the connection frame 140 connects between the side frames 110 and the seat back frame 130.
The seat cushion tilting operation and the seat back turning operation of such a tilt-flip type second row seat are performed only when the boarding and alighting access of the third row seat occupant is secured, and in a normal case, it is necessary to maintain a locked state by a separate lock device of the tilt-flip type seat to secure the safety of the second row seat occupant.
That is, when the lock device of the walk-in seat is unlocked, the seat cushion tilting operation and the seat back rotating operation are performed, and the seat cushion and the seat back are kept in a locked state without moving while the lock device is locked, to secure the safety of the second row seat occupant.
Fig. 2 is a perspective view showing the structure of a locking device of a conventional walk-in seat, fig. 3 is a side view showing a locked state of the locking device of the conventional walk-in seat, and fig. 4 is a side view showing an unlocked state of the locking device of the conventional walk-in seat.
As shown in fig. 2 to 4, the seat cushion frame 120 is tiltably connected to the side frames 110 mounted on the seat rail 100, and a connecting frame 140 connecting between the seat cushion frame 120 and the seat back frame 130 is rotatably connected to the side frames 110 to perform a walk-in operation.
In particular, the locking device 200 of the walk-in seat is installed between the connection frame 140 and the side frame 110.
As shown in fig. 2, the lock device 200 of the walk-in seat includes: a driving board 210 for a flipping operation; a pawl (paw) 220 for restraining the drive plate 210 or releasing the restraint of the drive plate 210; and a locking lever 230 for rotating the pawl 220 in a direction of restraining the driving plate 210 or in a direction of releasing the restraint of the driving plate 210.
The driving plate 210 is constructed in a structure in which both end portions thereof are hinge-fastened to the side frames 110 and the connection frame 140 and a sector gear 212 is formed at one side thereof.
In the pawl 220, an upper end portion is hinge-fastened to a predetermined position of the connection frame 140, a restraint gear 222 engaged with the sector gear 212 is formed at one side of a lower end portion, and a structure in which a restraint protrusion 224, a restraint release groove 226, and a restraint release protrusion 228 are sequentially formed at the other side of the lower end portion from bottom to top.
The locking lever 230 includes: a body portion 232 hinge-fastened to the connection frame 140; a locking portion 234 protrudingly formed at one side of the main body portion 232 to push the restriction protrusion 224 to the sector gear 212 side when the locking device of the walk-in seat is locked, or to push the restriction release protrusion 228 and inserted into the restriction release groove 226 when the locking device of the walk-in seat is released from locking; and a cable connection part 236 protrudingly formed at the other side of the body part 232 and connected to the walk-in lever (not shown) by a cable 238.
Here, the locking operation and the unlocking operation of the conventional lock device of the walk-in seat will be described as follows.
Fig. 5 is an enlarged view of a main portion showing a locked state of a lock device of a conventional walk-in seat, and fig. 6 and 7 are enlarged views of a main portion showing an unlocked state of the lock device of the conventional walk-in seat.
Referring to fig. 5, when the locking portion 234 of the locking lever 230 is disposed at a position for pushing the restricting protrusion 224 of the pawl 220, the restricting gear 222 of the pawl 220 engages with the sector gear 212 of the driving plate 210 to restrict the driving plate 210 from moving, and thus the driving plate 210 may be maintained in a stationary state at a position where a flipping operation is not performed.
On the other hand, when the cable 238 is pulled when the user operates the walk-in lever (not shown) to perform the walk-in operation, as shown in fig. 6, the lock lever 230 is rotated while the cable connecting portion 236 is pulled by the cable, at which time the lock portion 234 is inserted into the restriction releasing groove 226 of the pawl 220, and pushes the restriction releasing projection 228 to rotate the pawl 220 in the unlocking direction.
Then, as the pawls 220 rotate in the unlocking direction, the restraint gears 222 of the pawls 220 are separated from the sector gears 212 of the drive plate 210.
Therefore, as shown in fig. 7, the drive plate 210 is rotated to the tumble operation position, i.e., the position where the seat back frame 130 and the connecting frame 140 are rotated forward and erected, by the elastic restoring force of the coil spring 214 or the like.
However, the above-described conventional lock device of the walk-in seat has the following problems.
As shown in fig. 1, since the buckle 240 for fastening the seat belt is attached to the connecting frame 140, a torsional load acts on the connecting frame 140 as a load or the like for fastening the tongue portion of the seat belt to the buckle 240 is repeatedly applied, and the connecting frame 140 is deformed.
In particular, when the connection frame 140 is deformed by a torsional load, a phenomenon occurs in which the pawl 220 is unexpectedly rotated in a unlocking direction, so that the restraining gear 222 of the pawl 220 is separated from the sector gear 212 of the driving plate 210, and thus the locking device of the walk-in seat is unexpectedly unlocked.
In addition, as described above, when the lock device of the walk-in seat is unexpectedly unlocked, a safety problem may be caused to a passenger sitting in the second-row seat, and even if the lock device of the walk-in seat is re-locked, the problem of unlocking may easily occur repeatedly.
Disclosure of Invention
Technical problem to be solved
Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a locking device of a walk-in seat for a vehicle, which is configured to firmly maintain a locked state of the walk-in seat even if a connection frame of the seat to which a seat belt buckle is connected is deformed by a torsional load, and thus can prevent the walk-in seat from being unexpectedly unlocked.
(II) technical scheme
In order to achieve the above object, according to one embodiment of the present invention, there is disclosed a locking device of a walk-in seat for a vehicle, including: a driving plate coupled to a connection frame connecting between a side frame supporting a seat cushion frame and a seat back frame, the connection frame being moved to a tumbled position upon a tumbling operation of a seat; a pawl mounted on the connection frame and restraining the drive plate at a position before a walk-in operation of the seat or releasing the restraint of the drive plate at the walk-in operation; a locking lever installed on the connection frame and rotating the pawl in a direction of restraining the driving plate or in a direction of releasing the restraint of the driving plate; and a pressing shaft fixed to a lower end portion of the seat belt buckle and protrudingly coupled to the connection frame to laterally apply a load to the pawl in a direction in which the pawl is locked with the driving plate according to the load applied to the seat belt buckle.
Here, a groove may be formed in the connection frame, the pressing shaft may be coupled in the form of a groove penetrating the connection frame, the pressing shaft may be movable along the groove while a load is applied to the seat belt buckle, and the load may be applied to the pawl in a direction in which the locking is performed.
In addition, the pawls may be formed with load acting portions having a protruding shape to contact and catch the pressurizing shaft during movement of the pressurizing shaft along the grooves, and the pressurizing shaft may press the load acting portions to rotate the pawls in a direction locked with the driving plate.
In addition, a restraining gear may be formed at a lower side of a hinge coupling portion of the ratchet pawls, which is coupled to the connection frame, and engaged with the sector gear of the driving plate to restrain the driving plate, the load acting portion being formed to protrude upward at an upper side of the hinge coupling portion.
In addition, the groove may be formed in the connection frame to be elongated in the up-down direction.
In addition, the locking device of the walk-in seat for a vehicle according to the embodiment of the present invention may further include a buckle link having a first end rotatably hinge-coupled to the connection frame and a second end coupled to the pressurizing shaft, and the slot may be formed to have a shape determined by a moving track of the second end when the buckle link rotates centering on the first end.
(III) advantageous effects
With the above technical solution, the present invention provides the following effects.
According to the lock device of the walk-in seat of the embodiment of the present invention, the lower end portion of the seat belt buckle is provided with the pressing shaft, and the upper end portion of the pawl is formed with the load acting portion pressed by the pressing shaft so that the pressing shaft presses the load acting portion when a load acts through the seat belt buckle, at which time the pawl is configured to be rotatable in the direction in which the restraint gear further engages with the sector gear of the drive plate, so that the amount of tooth engagement and the locking force between the drive plate and the pawl can be increased, and the walk-in locked state can be firmly maintained.
In particular, even if the connection frame of the seat to which the seat belt buckle is connected is deformed by a torsional load, it is possible to effectively prevent a phenomenon in which the walk-in seat is unexpectedly unlocked.
Drawings
Fig. 1 is a side view showing a state in which a tilt-tumble second-row seat is operated.
Fig. 2 is a perspective view showing the structure of a locking device of a conventional walk-in seat.
Fig. 3 is a side view showing a locked state of a locking device of a conventional walk-in seat.
Fig. 4 is a side view showing an unlocked state of a locking device of a conventional walk-in seat.
Fig. 5 is an enlarged view of a main portion showing a locked state of a locking device of a conventional walk-in seat.
Fig. 6 and 7 are enlarged views of a main part illustrating an unlocking operation of a locking device of a conventional walk-in seat.
Fig. 8 is a perspective view showing the structure of a lock device of a walk-in seat according to an embodiment of the present invention.
Fig. 9 and 10 are operation state diagrams for explaining a locked (locking) state and an unlocked (unlocking) state of the locking apparatus according to the embodiment of the present invention.
Fig. 11 and 12 are views showing a state where a load acts through a buckle in a locking device of a walk-in seat for a vehicle according to an embodiment of the present invention.
Description of the reference numerals
10: seat cushion 20: chair back
100: seat rail 110: side frame
120: the cushion frame 130: seat back frame
140: the connection frame 142: trough
200: the locking device 210: driving board
212: sector gear 214: spiral spring
220: the pawl 221: hinge joint
222: the restraint gear 224: restraint protrusion
226: restraint-releasing slot 228: restraint-releasing projection
229: load acting portion 230: locking rod
232: main body 234: locking part
236: the cable connection portion 238: cable with a flexible connection
240: buckle 242: pressure shaft
250: buckle link 252: first end part
254: fastener 256: second end portion
Detailed Description
Hereinafter, preferred embodiments of the present invention are described in detail with reference to the accompanying drawings.
Fig. 8 is a perspective view showing a lock device of a walk-in seat for a vehicle according to an embodiment of the present invention, and fig. 9 and 10 are views for explaining a locked state and an unlocked state of the lock device according to the embodiment of the present invention.
In contrast to the above-described known walk-in seat, a walk-in seat to which the locking device according to the embodiment of the invention is applied is not different in that the seat cushion frame is tiltably connected to the side frames mounted on the seat rails, the connecting frame connecting between the seat cushion frame and the seat back frame is rotatably connected to the side frames, the connecting frame connects between the side frames and the seat back frame, and the operation in which the seat cushion frame is tilted downward and the operation in which the seat back frame and the connecting frame are rotated forward and erected.
As shown in fig. 8, the locking device 200 of the walk-in seat according to the embodiment of the present invention includes: a driving plate 210 for a tilting operation of the seat; a pawl (paw) 220 to restrain the drive plate 210 or to release the restraint of the drive plate 210; and a locking lever 230 rotating the pawl in a direction to restrain the driving plate 210 or in a direction to release the restraint of the driving plate 210.
In the structure of the locking device 200, a driving plate 210 is provided with both end portions hinge-coupled to the side frames 110 and the connection frame 140 of the seat, respectively, and a sector gear 212 is formed at one side of the driving plate 210.
At the time of the walk-in operation of the seat, the driving plate 210 rotates upward from the side frame 110, at which time the connection frame 140 is moved to the walk-in position.
A pawl 220 is hinge-coupled to a predetermined position of the coupling frame 140, and a restricting gear 222 engaged with the sector gear 212 of the driving plate 210 is formed at one side of a lower end portion of the pawl 220. Further, a restraint projection 224, a restraint release groove 226, and a restraint release projection 228 are formed in this order from the bottom to the top on the other side of the lower end portion of the pawl 220.
The locking bar 230 includes: a body portion 232 hinge-coupled to the connection frame 140; a locking portion 234 protrudingly formed at one side of the body portion 232 to push the restraint projection 224 of the pawl 220 toward the sector gear 212 side when the lock device 200 is locked, or to push the restraint release projection 228 of the pawl 220 in the release direction and to be inserted into the restraint release groove 226 when the lock device 200 is released from locking; and a cable connection part 236 protrudingly formed at the other side of the body part 232 to be connected to the walk-in lever (not shown) by a cable 238.
On the other hand, a seat belt buckle 240 is mounted on the connecting frame 140 of the walk-in seat, the buckle 240 being a portion of the belt device into which a tongue (not shown) coupled to an end of the webbing is inserted to be fastened.
Referring to the structure in which the buckle 240 is mounted on the connection frame 140, the lower end portion of the buckle 240 is coupled to the outer side surface of the connection frame 140, and at this time, a pressing shaft 242 is provided in a fixed state at the lower end portion of the buckle 240.
The pressing shaft 242 is provided in a state of penetrating the connection frame 140, for which an elongated groove 142 is formed in the connection frame 140, and the pressing shaft 242 is provided to be movable along the groove 142 in a state of penetrating the groove 142 of the connection frame 140.
As described above, the pressing shaft 242 is provided such that one end of the pressing shaft 242 is coupled to the lower end of the buckle 240 on the outside of the connecting frame 140 and the other end of the pressing shaft 242 on the opposite side extends and protrudes laterally on the inside of the connecting frame 140 in a state of being inserted through the groove 142 of the connecting frame 140.
A buckle link 250 extending obliquely downward from the buckle 240 is attached to an outer surface of the connecting frame 140, and a first end 252 (lower end of the buckle link in the figure) of the buckle link 250 is hinge-coupled to the connecting frame 140 by a fastener 254 outside the connecting frame 140.
Further, outside the connection frame 140, a second end 256 (an upper end of the buckle link in the drawing) of the buckle link 250 is coupled to the pressing shaft 242 penetrating the groove 142 of the connection frame 140.
At this time, the pressurizing shaft 242 may be coupled in a structure penetrating the second end 256 of the buckle link 250, and the second end 256 of the buckle link 250 may be rotatably coupled to the outer circumferential surface of the pressurizing shaft 242 outside the connection frame 140.
The slot 142 is formed in the connection frame 140 in an up-down inclined direction, and more particularly, the slot 142 may be formed to have a length determined by the shape of a moving track of the second end 256 of the buckle link 250 when the buckle link 250 rotates centering on the first end 252 and the fastener 254.
At this time, the pressing shaft 242 is fixedly coupled to the lower end portion of the buckle 240 at the outside of the connection frame 140 in a state of being coupled through the groove 142 of the connection frame 140 and extends and protrudes laterally in the space inside the connection frame 140.
In the structure as described above, the position of the pressing shaft 242 is a position where the lower end portion of the buckle 240 is combined in the connection frame 140, which is a mounting point where the buckle 240 is mounted to the connection frame 140.
In addition, the lower end portion of the buckle 240 and the pressing shaft 242, and the second end portion 256 of the buckle link 250 are portions movable along the slot, and thus the fastener 254, which hinge-couples the first end portion 252 of the buckle link 250 to the connection frame 140 at this time, is a buckle hinge point in the connection frame 140.
In addition, in the embodiment of the present invention, the upper portion of the pawl 220 is formed with the load acting portion 229, and the load acting portion 229 is formed to have a shape elongated upward at the hinge coupling portion 221 coupled with the connection frame 140 as the rotation center portion of the pawl 220.
The load acting portion 229 in the pawl 220 is a portion formed to catch the pressing shaft 242 when the pressing shaft 242 moves upward along the groove 142 of the connection frame 140, and is a portion provided to come into contact with the pressing shaft 242 and be pressed by the pressing shaft 242 during the upward movement of the pressing shaft 242 along the groove 142 when a load acts upward on the buckle 240.
As described above, when the pressing shaft 242 pushes the load acting portion 229 as the upper end portion of the pawls 220 upward or applies an upward force to the load acting portion 229, a force rotating in a direction in which the restraint gear 222 meshes with the sector gear 212 of the drive plate 210 acts on the pawls 220 through the pressing shaft 242.
Therefore, in the locking device 200 according to the present invention, in the case where a load pulling upward acts on the buckle 240, even if a torsional load acts on the inner frame of the seat such as the connection frame 140 through the buckle 240 to cause deformation of the frame, the pressing shaft 242 coupled to the lower end portion of the buckle 240 pushes the load acting portion 229 of the pawl 220 upward while moving along the groove 142 of the connection frame 140, and thus the load acts on the pawl 220 in a direction in which the restraint gear 222 further engages with the sector gear 212 of the driving plate 210.
Therefore, the amount of tooth engagement and the locking force between the pawls 220 and the drive plate 210 can be increased, and the tumble locking state can be securely maintained.
In contrast, in the conventional locking device, when a load acts on the buckle, the pawl is subjected to a force in a direction in which the restraint gear is spaced from the sector gear of the drive plate due to the load acting on the buckle, and at this time, there may actually occur a case in which the restraint gear of the pawl is spaced from the sector gear of the drive plate and causes the locked state of the seat to be released.
The structure of the lock device according to the embodiment of the present invention is described above, and the operation state of the lock device according to the embodiment of the present invention will be described below.
Fig. 9 shows a locked state of the lock device according to the embodiment of the present invention, and fig. 10 shows an unlocked (unlocked) state.
As shown in fig. 9, in the locked state, the restriction gear 222 of the pawl 220 is engaged with the sector gear 212 of the driving plate 210, and at this time, the locking portion 234 of the locking lever 230 supports the pawl 220 in a state of pressing the restriction protrusion 224 of the pawl 220.
Therefore, the pawl 220 cannot be rotated and restrained (locked) due to the lock lever 230, while maintaining a state in which the restraining gear 222 of the pawl 220 is meshed with the sector gear 212 of the drive plate 210, i.e., a locked state.
In this locked state, when the user operates the walk-in lever, as shown in fig. 10, the locking lever 230 is rotated in the unlocking direction (clockwise direction in the drawing) while the cable connecting portion 236 is pulled by the cable 238.
At this time, the locking portion 234 of the rotated locking lever 230 pushes the restraint-releasing projection 228 while being inserted into the restraint-releasing groove 226 of the pawl 220, so that the pawl 220 is rotated in the unlocking direction.
That is, the pawls 220 rotate counterclockwise in the drawing centering on the hinge coupling portions 221 coupled with the connection frame 140, and the restraint gears 222 formed at the lower sides of the hinge coupling portions 221 in the pawls 220 are lifted upward and separated from the sector gears 212 of the driving plate 210, so that the locking between the pawls 220 and the driving plate 210 is released.
Next, fig. 11 shows a state in which a load acts through the buckle 240 in the locking device 200 of the walk-in seat for a vehicle according to the embodiment of the present invention, and fig. 12 shows the state of fig. 11 as viewed from the outside of the connection frame 140.
The driving plate 210, the pawls 220, the locking lever 230, etc. of the assembly of the locking device shown in fig. 12 are mounted on the inner side surface of the connection frame 140, and the buckle link 250 is mounted on the outer side surface of the connection frame 140.
Therefore, since the driving plate 210, the pawls 220, and the locking lever 230 in fig. 12 are located inside the connecting frame 140, the connecting frame 140 covers the driving plate 210, the pawls 220, the locking lever 230, and the like, but the driving plate 210, the pawls 220, the locking lever 230, and the like are overlapped with the connecting frame 140, the buckle link 250, and the like in fig. 12 in order to easily understand the installation state and the operation state of the respective components of the locking device 200.
First, when a load acts upward, i.e., in the "a" direction of fig. 11, on the buckle 240, the buckle mounting point in the connection frame 140 and the pressing shaft 242 located at the buckle mounting point move upward along the groove 142 of the connection frame 140 and can be brought into contact with the load acting portion 229 of the pawl 220 located at the upper side.
At this time, the buckle link 250 rotates upward (clockwise in the drawing) centering on the first end 252 hinge-coupled to the connection frame 140 by the fastener 254, and the second end 256 of the buckle link 250 moves upward along the groove 142 together with the pressing shaft 242.
Therefore, the pressing shaft 242 pushes the load acting portions 229 of the pawls 220 upward, and the pressing shaft 242 applies a load to the pawls 220 in a direction of locking the driving plate 210 through the load acting portions 229 of the pawls 220.
That is, as the pressing shaft 242 pushes the load acting portion 229 upward, the pawls 220 are intended to rotate clockwise in the drawing about the hinge coupling portions 221 coupled to the coupling frame 140, and at this time, the pawls 220 are intended to rotate in a direction to increase the amount of engagement between the restraint gear 222 of the pawls 220 and the sector gear 212 of the drive plate 210.
Therefore, even if a load acts on the seat belt buckle 240, since the pawl 220 rotates in a direction in which the restraint gear 222 further engages with the sector gear 212 of the drive plate 210, the amount of tooth engagement and the locking force between the drive plate 210 and the pawl 220 can be increased, and the tumble lock state can be securely maintained.
Therefore, according to the locking device of the present invention, even if the connection frame 140 of the seat to which the seat belt buckle 240 is connected is deformed by a torsional load, it is possible to effectively prevent the tumble seat from being unexpectedly unlocked.
The embodiments of the present invention have been described in detail above, but the scope of the right of the present invention is not limited thereto, and various modifications and changes by those skilled in the art using the basic concept of the present invention defined in the claims are also included in the scope of the right of the present invention.

Claims (6)

1. A locking device of a walk-in seat for a vehicle, comprising:
a driving plate coupled to a connection frame connecting between a side frame supporting a cushion frame and a seat back frame, the connection frame being moved to a tumbled position upon a tumbling operation of a seat;
a pawl mounted on the connection frame and restraining the driving plate at a position before a walk-in operation of the seat or releasing the restraint of the driving plate at the walk-in operation;
a locking lever installed on the connection frame and rotating the pawl in a direction of restraining the driving plate or in a direction of releasing the restraint of the driving plate; and
and a pressing shaft fixed to a lower end portion of the seat belt buckle and protrudingly coupled to the connection frame to laterally apply a load to the pawl in a direction in which the pawl is locked with the driving plate according to the load applied to the seat belt buckle.
2. The lock device of a walk-in seat for a vehicle according to claim 1,
a groove is formed in the connection frame,
the pressurizing shaft is combined in the form of a groove penetrating the connection frame,
the pressing shaft moves along the groove while a load acts on the seat belt buckle, and acts on the pawl in a direction in which locking is performed.
3. The lock device of a walk-in seat for a vehicle according to claim 2,
the pawl is formed with a load acting portion having a protruding shape to contact and catch the pressing shaft during movement of the pressing shaft along the groove,
the pressing shaft presses the load acting portion to rotate the pawl in a direction locked with the drive plate.
4. The lock device of a walk-in seat for a vehicle according to claim 3,
a restraining gear is formed at a lower side of a hinge coupling portion of the pawls, which is coupled to the connection frame, and engaged with the sector gear of the driving plate to restrain the driving plate,
the load acting portion is formed to protrude in an upward extending manner at an upper side of the hinge coupling portion.
5. The lock device of a walk-in seat for a vehicle according to claim 2,
the groove is formed in the connection frame to be elongated in the up-down direction.
6. The vehicle tumble seat locking apparatus according to claim 2, characterized by further comprising a buckle link,
a first end of the buckle link is rotatably hinge-coupled to the connection frame, and a second end is coupled to the pressurizing shaft,
the slot is formed to have a shape determined by a moving track of the second end portion when the buckle link rotates centering on the first end portion.
CN202210349840.3A 2021-04-16 2022-04-02 Locking device for vehicle tilting seat Withdrawn CN115214435A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020210049657A KR20220143298A (en) 2021-04-16 2021-04-16 Locking device for walk-in seat of vehicle
KR10-2021-0049657 2021-04-16

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CN115214435A true CN115214435A (en) 2022-10-21

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CN202210349840.3A Withdrawn CN115214435A (en) 2021-04-16 2022-04-02 Locking device for vehicle tilting seat

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US (1) US20220332224A1 (en)
KR (1) KR20220143298A (en)
CN (1) CN115214435A (en)
DE (1) DE102022108926A1 (en)

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JP2007015556A (en) * 2005-07-07 2007-01-25 Nissan Motor Co Ltd Seat slide lock device for vehicular seat
JP2011016482A (en) * 2009-07-10 2011-01-27 Toyota Boshoku Corp Seat belt device
KR20200049060A (en) * 2018-10-31 2020-05-08 주식회사다스 Link locking structure of seat for vehicle
CN112078440A (en) * 2019-06-14 2020-12-15 现代自动车株式会社 Tilting device for vehicle seat
KR102184744B1 (en) * 2020-08-18 2020-12-07 대원정밀공업(주) Sub-lock assembly to prevent turning of height link in case of vehicle collision

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US20220332224A1 (en) 2022-10-20
KR20220143298A (en) 2022-10-25
DE102022108926A1 (en) 2022-10-20

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Application publication date: 20221021